Assertion is the hazy line between passivity and aggression. With societal preferences in constant flux, so is the amount of confidence and authority that is acceptable for women to display. Many women believe that it is inappropriate to display any anger at all. They are kept subdued by deep-rooted guilt and irrational beliefs, often taking responsibility for how others feel or react.

Deciding when to be assertive can be a troublesome issue, and many choose to avoid the decision altogether. Their interpersonal achievements are gained through forms of manipulation. They...